parisc: Update comments in syscall.S regarding wide userland

We do support running 64-bit userspace processes, although there isn't
yet full gcc and glibc support. Anyway, fix the comments to reflect the
reality.

Signed-off-by: Helge Deller <deller@gmx.de>

diff --git a/arch/parisc/kernel/syscall.S b/arch/parisc/kernel/syscall.S
index be451766e9d00dd296a5214679f86df29274f0b4..f453997a7b8f219e2657cfd146660658d87c3d2a 100644 (file)
--- a/arch/parisc/kernel/syscall.S
+++ b/arch/parisc/kernel/syscall.S
@@ -108,12 +108,8 @@ linux_gateway_entry:
        mtsp    %r0,%sr6                        /* get kernel space into sr6 */
 
 #ifdef CONFIG_64BIT
-       /* for now we can *always* set the W bit on entry to the syscall
-        * since we don't support wide userland processes.  We could
-        * also save the current SM other than in r0 and restore it on
-        * exit from the syscall, and also use that value to know
-        * whether to do narrow or wide syscalls. -PB
-        */
+       /* Store W bit on entry to the syscall in case it's a wide userland
+        * process. */
        ssm     PSW_SM_W, %r1
        extrd,u %r1,PSW_W_BIT,1,%r1
        /* sp must be aligned on 4, so deposit the W bit setting into
@@ -478,16 +474,13 @@ tracesys_sigexit:
 lws_start:
 
 #ifdef CONFIG_64BIT
-       /* FIXME: If we are a 64-bit kernel just
-        *        turn this on unconditionally.
-        */
        ssm     PSW_SM_W, %r1
        extrd,u %r1,PSW_W_BIT,1,%r1
        /* sp must be aligned on 4, so deposit the W bit setting into
         * the bottom of sp temporarily */
        or,ev   %r1,%r30,%r30
 
-       /* Clip LWS number to a 32-bit value always */
+       /* Clip LWS number to a 32-bit value for 32-bit processes */
        depdi   0, 31, 32, %r20
 #endif